From the manufacturer Brand Information: The Draper range is our standard Draper product, suitable for trades and the enthusiast. Manufactured with quality in mind. Draper 89716 9-Piece Holesaw Kit for Downlights Features: Comprises sizes suitable for cutting holes for downlight instalation in wood or plastic. High carbon steel blades with induction hardened teeth. Contents: 6 holesaw blades size: 51, 60, 64, 70, 75 and 86 mm diameter Arbor with HSS pilot drill Hexagon key